Patil, A. B. ., & Shaba, T. G. . (2023). Sharp initial coefficient bounds and the Fekete–Szegö problem for some certain subclasses of analytic and bi-univalent functions. Ukrains’kyi Matematychnyi Zhurnal, 75(2), 198-206. https://doi.org/10.37863/umzh.v75i2.6602